Keyboard adding-machine.



F. RAUCHWETTER. KEYBOARD ADDING MACHINE. Prucmou mso Dc.2s. 191s.

1,239,622. Pnfenfedsepn 11,1917.

F. RAUCHWETYER.

KEYoAno Aonms MACHINE.

Patented Sept. 1l, 1917.

SHEETS-SHEET 2.

F. RAucHwETTER.

KEYBOARD ADDING MACHINE. :mmc/mou mio nic. 2s. m6.'

1,239,622. PatentedSeptll, 1917.

1 5 SHEETS-SHEET-3.

F. RAUCHWETTER.

KEYBOARD ADDING MACHINE.

Mmc/mon msn 05m29.191s.

Patented Sept. 1l, 1917.

5 SHEETS-*SHEET 4.

F. RAUCHWETTEH.

KEYBOARD ADDING MACHINE.

APPLICATION meu use zs. 19H5A Patented Sept. 11, 1917.

5 SHEES-SHEET 5.

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rArENToFFIcE.

Tf-FRANZ lRPAUCHWETTEB; 02|!" BERLINFRIEDENA,WGERMANY.

` .ammoaiiacn.iADJSINGMMAGEINE.l

, maywMm-" Bev it known' .that tI, FRNERAItyvn'MEIg ande@- y y c Berlin- Friedenaii, Il Germany', have," iriveted certain new and usfil'inprovene'nts iii" Keyboard The ,present inveiitio'n 'relates 'to' improvements in keyboard'adding-niachinesand in particular Ato, .-the operatin li lich the presentv The 'addingLm/ac img.. to, w

""fTlrebell-c'raiiks2 have 'two downwardly 1"i'proctiii'garms5"and 6` (Figs. 2 and 3). A The arms 5 are all of the same length,'while the arms 6 ,gradually decrease in' length. ""Wlien akyisidepressed (Fig. 3) the arm 5 J fthelellciank bperated engages in a notch 'inabar `8 ekt'eiidingbeneath arm 5,'after -I saidib'arhas been previously drawn down by passage:fjarmand thereby released a previouslyset bell-crank 2 and the keys con` Lpled,theretaf"Atthesame time the arm (i of the o eratdd'bell'v-crankQ will shift the bar .1, l inventlon refers in particular are siich Which'- 4, havin' hoses ,S'by a given distance. 'l his have abutments adjustable inl'adi'ance accoi-ding to their' face `value', i'vli'ich abut-iibellirak 1'1 rocking on'pivotlU, the arm ments Ilimit. the, tlgavel, 0f.,th.f.= transmitting,

'i barji 'c'otipledby meansof a bar Slwith a )t which bell-c ank is thereby Aturned through means to the counting gear, fh'e'n"sa'itli ,grigie ii' prdpbdrti'dii 'tliit'leface value' ol' mitting means are operated by the"in'a,111i 'the {ey depressed. To the free end of bell shaft of the machine.

The essential feature of the present in vention consists in the cooperation of bellcranks set in advance by the numeral keys with rocking clips of known design, operatable by the main shaft of the machine, the jaws of which clips are provided with notches corresponding to the numerals 1-9, with which they grip pins or abutlnents provided on the said bell cranks in such a manner that the stroke of said jaws is thereby limited.

In the accompanying drawing the present invention has been exemplified in a constructional form; Figure 1 isa side elevation, partly in section; Fig. 1 is a side view of the keyboard, partly in section, illustrating the engagement between the bell cranks and a ratchet bar. Fig. 2 is a front elevation partly in section; Fig. 3 is a side elevation of a row of keys with one key depressed, likewise partly in section, and Fig. 4 is a perspective view of the oscillating arrester bar; Figs. 5 and 7 are front and side elevation, respectively of a part of the machine shown in Fig. 1, showing in particular the bell-crank gear in the same position as in Fig. 1, and Fig. 6 shows the same gear in a diierent position, namely in engagement with the counting gear wheel 22. lu s. 8, 9, 10 and 11 are various parts shown in figs. 5, 6 and 7, illustrated individually.

As may be seen from the drawing, the keys 1 operate bell cranks 2 which are under action of springs, which bell-cranks dis; place a bar, 4, havin noses 3 in the fol!` lowing manner according to the face value of the key depressed:

crank 11 is fitted a pin 12, which will therefore assume a given position corresponding to the key depressed. This pin 12, in doing so, rocks in the path of jaws 13 and 13 of a clip 13. These jaws 13 and 13 are provided in known manner with notches 14, the number and position of which correspoinl to the numerals 1-9 of one row of keys. After the bell-crank 11 and its pin 1Q have been set the said clip 13 is operated by aid of a connecting rod 16 from the main shaft 1.1 of the machine to which it is connected in any suitable manner well known with nnnahines of this kind.

The said connecting rod 16 operates on a lever 17 rocking on a Hxed pivot 23, being coupled thereto with a pin 16'; this lever 17 again operates a lever 18 by means of a pin 17 engaging in a slot in the latter. The lever 18 is thus coupled both with the jaw 13 and the jaw 13 of clipA 13, namely with jaw 13 by a pin .13, which is fitted in a. hole in jaw 13 and engages in a small slot in lever 18; with jaw 13 by means of a pin 1b" which engages in a hole in said jaw. The jaws 13 and 13 rock on pin 19. When, therefore, the bar 1G is operated (see Fig. G) the jaw 13 Will by means of lever 17 and lever 18 be turned on pin 19 until a corresponding notch 14 of said jaw engages with tie reviously set abutment pin 12 of belt cran i 11. Thereby the further travel of the jaw 13 is prevented.

When, now, the bar 16 is moved further the lever 18 Will rock With its slot on pin 13a of jaw 13', which is now stationary and Will thereby rock the yaw 13, to the lower end of which it is lin red at 18', on pin 19 until the corresponding notch 14 of jaw 13 likewise engages with the abutment pin 12 of bell-crank 11 (see Fig. 6)'.` `By'the oscillation of jaw 13 the ext/ended arm 2O of the same is likewise rocked and will thereby rock the toothed sector 21, which transmitsthe rotation to the counting gear-f-wheelQQ.

The counting gear. isprovidedin known manner with tens transfer The machine may be operated by lmeans of an operating lever, a crank handle Loralso by a suitable motor.

I claim:

In keyboard adding. machines .in .combination with the main shaft, abutments set-1 table by keys in accordance withthe .face value of the latter, said abutments limiting the travel of the transmitting means o erated by the main shaft, bell cranks, roc ing on fixed pins in proportion to theface value of the keys depressed, clips operatable rom the mainshaft, the jaws of said clips having notches corresponding to the numerals 1-9,

the said bell-cranks having arms carrying I Copies o! this patent may be obtained topi` ...desseins for addltions.

abutment pins, said abutment pins adapted to be engaged by said jaws, numbered keys, bell-cranks under action Aof springs and engaged by said keys, said bell-cranks having each two 'downward extending arms, the ones of said pairs of arms of equal length, the others of said pairs of arms gradually in length, a bar having abutments, said'abutments adapted to be engaged by said gradually decreasing arms and to thereby shift thesaid bar by a given .length corresponding to the face value of the respective key depressed, an arrester bar, for arresting the keys in their depressed position, elasticall and` hingedl suspended, and adapted `to. e released an arrested by said arms of equal length.

In testimony whereof I have hereunto set my hand in the -presence of two subscribing witnesses.

FRANZ BAUCHWETTER. Witnesses:

HENRY HABPER, .ALLEN F. JENNINGS.

live ce mis cath, yby addressing the "Commissioner of Patents, Warrington, n. c." 

